3GPP TS 36.212, "Multiplexing and channel coding"
3GPP TS 36.212, "Multiplexing and channel coding"
3GPP TS 36.212, "Multiplexing and channel coding"
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Release 8<br />
33<br />
<strong>3GPP</strong> <strong>TS</strong> <strong>36.212</strong> V8.1.0 (2007-11)<br />
a0 ,...,<br />
, a1<br />
a A −1<br />
Transport block<br />
CRC attachment<br />
b0 ,...,<br />
, b1<br />
b B −1<br />
Code block segmentation<br />
Code block CRC attachment<br />
cr0 , cr1,...,<br />
cr( −1)<br />
K r<br />
Channel coding<br />
( i)<br />
( i)<br />
( i)<br />
dr0 , dr1<br />
,..., dr( D −1)<br />
r<br />
Rate matching<br />
er0 , er1,...,<br />
er( −1)<br />
E r<br />
Code block<br />
concatenation<br />
f 0 ,...,<br />
, f1<br />
f G −1<br />
Figure 5.3.2-1: Transport <strong>channel</strong> processing for DL-SCH, PCH <strong>and</strong> MCH<br />
5.3.2.1 Transport block CRC attachment<br />
Error detection is provided on transport blocks through a Cyclic Redundancy Check (CRC).<br />
The entire transport block is used to calculate the CRC parity bits. Denote the bits in a transport block delivered to layer<br />
1 by a 0 , a1,<br />
a2<br />
, a3,...,<br />
a A −1<br />
, <strong>and</strong> the parity bits by p 0 , p1,<br />
p2<br />
, p3,...,<br />
p L −1<br />
. A is the size of the transport block <strong>and</strong> L is the<br />
number of parity bits.<br />
The parity bits are computed <strong>and</strong> attached to the transport block according to subclause 5.1.1 setting L to 24 bits <strong>and</strong><br />
using the generator polynomial g CRC24A (D).<br />
5.3.2.2 Code block segmentation <strong>and</strong> code block CRC attachment<br />
The bits input to the code block segmentation are denoted by b 0 , b1<br />
, b2<br />
, b3<br />
,..., b B −1<br />
where B is the number of bits in the<br />
transport block (including CRC).<br />
Code block segmentation <strong>and</strong> code block CRC attachment are performed according to subclause 5.1.2.<br />
The bits after code block segmentation are denoted by c r0 , cr1,<br />
cr2<br />
, cr3<br />
,..., cr( K r −1)<br />
, where r is the code block number<br />
<strong>and</strong> K r is the number of bits for code block number r.<br />
5.3.2.3 Channel coding<br />
Code blocks are delivered to the <strong>channel</strong> coding block. They are denoted by c r0 , cr1,<br />
cr2<br />
, cr3<br />
,..., cr( K r −1)<br />
, where r is the<br />
code block number, <strong>and</strong> K r is the number of bits in code block number r. The total number of code blocks is denoted by<br />
C <strong>and</strong> each code block is individually turbo encoded according to subclause 5.1.3.2.<br />
<strong>3GPP</strong>
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